Here is the **English translation** of the practical application scenarios for **PD-Free Testing (Partial Discharge-Free Testing)**:
1. Factory Testing of Power Transformers/Reactors**
- **Purpose**: Verify the insulation performance of high-voltage transformers/reactors under rated voltage to ensure no insulation degradation caused by partial discharge (PD).
- **Scenarios**:
- Insulation strength testing between transformer windings and core.
- Detecting internal voids, oil-paper insulation defects (e.g., moisture, impurities).
- Insulation system verification for UHV (Ultra High Voltage) transformers (e.g., ±800 kV DC transformers).
2. Insulation Testing of High-Voltage Cables and Accessories**
- **Purpose**: Ensure cable joints, terminations, and other accessories are free from PD-induced breakdown risks during long-term operation.
- **Scenarios**:
- Acceptance testing after cable installation (e.g., underground cables, submarine cables).
- Detecting micro-pores, mechanical damage, or uneven semi-conductive layers in cable insulation.
- Voltage ratings: 10 kV–500 kV, especially for cross-linked polyethylene (XLPE) cable systems.
3. GIS (Gas-Insulated Switchgear) and Circuit Breaker Testing**
- **Purpose**: Validate the SF6 gas insulation performance of GIS to avoid failures caused by PD.
- **Scenarios**:
- Insulation testing of GIS busbars, disconnectors, and earthing switches.
- Detecting metal particles, insulator cracks, or assembly errors causing discharge.
- Applicable to transmission systems of 110 kV and above.
4. Insulation Verification for Renewable Energy Equipment**
- **Purpose**: Ensure insulation reliability of wind power/photovoltaic equipment (e.g., wind turbines, inverters, pad-mounted substations) in harsh environments.
- **Scenarios**:
- Humidity-resistant insulation testing for offshore wind farm step-up transformers.
- Analyzing discharge characteristics of PV inverter high-voltage insulation materials.
- Detecting insulation stress issues caused by frequent switching or harmonics.
5. Traction Power Supply System Testing for Electrified Railways**
- **Purpose**: Guarantee safe operation of traction transformers and catenary insulators under high load.
- **Scenarios**:
- PD detection in traction transformers under 25 kV AC power supply.
- Insulation performance verification of catenary insulators in high-humidity/dusty environments.
- Preventing traction system tripping or train shutdowns due to discharge.
6. Research and Development of New Insulation Materials**
- **Purpose**: Evaluate discharge characteristics of novel insulation materials (e.g., nano-composites, eco-friendly gases).
- **Scenarios**:
- Laboratory simulation of PD thresholds under extreme voltages.
- Comparing traditional epoxy resins with new eco-friendly insulation materials.
- Providing test data for revisions of IEEE, IEC, and other international standards.
**7. Preventive Maintenance of Power Equipment**
- **Purpose**: Regularly inspect insulation conditions of operational equipment to identify latent defects.
- **Scenarios**:
- Annual insulation testing of substation transformers and capacitors.
- Detecting insulation aging (e.g., oil-paper carbonization) in aging equipment.
- Preventive replacement of high-risk equipment to reduce unplanned outages.
**8. HVDC (High-Voltage Direct Current) System Testing**
- **Purpose**: Ensure insulation stability of DC cables and converter transformers under continuous DC voltage.
- **Scenarios**:
- Long-term PD analysis of ±500 kV/±800 kV DC cables.
- Performance verification of valve hall insulators in high-altitude or polluted environments.
- Addressing space charge accumulation issues in DC electric fields causing PD.
**9. Aerospace and Military Equipment Testing**
- **Purpose**: Ensure fail-safe insulation for electrical equipment in high-reliability scenarios.
- **Scenarios**:
- PD detection in aircraft high-voltage distribution system insulation materials.
- Anti-extreme-environment insulation testing for military radars and shipboard power systems.
- Insulation life assessment of nuclear plant safety-grade transformers.
Application Scenarios of KDCJ-20Z Touchscreen Intelligent Impulse Withstand Voltage Tester**
The **KDCJ-20Z Touchscreen Intelligent Impulse Withstand Voltage Tester** is a high-precision instrument designed to perform full-wave lightning impulse voltage tests on various power equipment. It is widely used in the fields of power systems, electrical equipment manufacturing, scientific research institutions, and quality inspection departments. Below are its main application scenarios:
1. **Power Transmission and Distribution Equipment Testing**
- Used to evaluate the insulation performance of transformers, circuit breakers, insulators, switchgear, and other high-voltage equipment under simulated lightning conditions.
- Ensures that equipment can withstand transient overvoltages caused by lightning strikes or switching surges.
2. **Electrical Equipment Manufacturing and Quality Control**
- Applied in production lines and R&D labs for testing new products' dielectric strength.
- Helps manufacturers comply with international standards (e.g., IEC) and improve product reliability and safety.
3. **Research and Development in Electrical Engineering**
- Utilized by universities and research institutes for studying insulation materials, protective devices, and high-voltage technologies.
- Provides accurate and repeatable impulse waveforms for experimental analysis.
4. **Preventive Maintenance and Field Testing**
- Deployed by utility companies and maintenance teams to assess the condition of aging equipment in substations and transmission lines.
- Ensures long-term operational safety and reduces the risk of unexpected outages.
5. **Certification and Compliance Testing**
- Employed by testing laboratories to conduct standardized lightning impulse tests required for product certification (e.g., CE, UL, IEC).
- The built-in waveform evaluation algorithm ensures compliance with international test standards.
6. **Training and Educational Institutions**
- Used in technical training centers and educational institutions to teach students about high-voltage testing techniques and insulation coordination principles.
7. **Special Industrial Applications**
- Applied in industries such as rail transit, oil & gas, and renewable energy where high-reliability electrical systems are critical.
- Ensures that control systems, converters, and protection devices can withstand harsh electrical environments.
With features like touchscreen control, integrated waveform display, database management, and fast discharge protection, the **KDCJ-20Z** provides a safe, efficient, and user-friendly solution for high-voltage impulse testing across a wide range of applications.
500A 1000A 2000a high current generator transformer ratio test temperature rise test device
It is mainly used to conduct insulation strength tests on various electrical products, electrical components, insulating materials, etc. under specified voltages, in order to assess the insulation level of the products, discover insulation defects of the test samples, and measure the ability to withstand overvoltage.
It integrates functions such as AC withstand voltage, DC withstand voltage, insulation resistance, ground conduction resistance, power, starting, leakage current, arc detection, and open circuit detection.
It can quickly and accurately measure the withstand voltage strength of electronic components, household appliances, insulating materials, instruments and meters, lighting appliances, and electric heating appliances.
It meets the lightning impulse test requirements of distribution transformers, high-voltage switchgear, current transformers and electromagnetic voltage transformers
Suitable for 6-10KV grade switches and insulators; And the full wave test of lightning impulse voltage of transformer and transformer without cut wave test requirement.
This parameter is applicable to the full wave test equipment of lightning impulse voltage of transformers, transformers, switches and other power products such as 35kV and below.
The test equipment of simulating pulse high voltage is mainly used to carry out impulse voltage test of full impulse voltage wave, truncated impulse voltage wave and operational impulse voltage wave of electric power equipment, and check the insulation pe
Suitable for all kinds of household appliances, power switches, wires and cables, transformers, terminal terminals, high voltage bakelite electrical appliances, motors, medical, chemical, instrumentation, etc., as well as the safety of the strong current system voltage and leakage current testing, but also scientific research laboratories, technical supervision departments indispensable voltage test equipment.
It is mainly used for primary busbar protection and the ratio and polarity of various current transformers, as well as the operation time of primary current test of power system, and is widely used in scientific research, production and electrical test sites of electric power, railway, petrochemical, metallurgy and mining enterprises.
KDWS-2500A intelligent DC high-current generator (DC high-current source) User basis: Used for continuous current-carrying temperature rise, current-carrying current and current cycle test of current-carrying conductive products in electrified railway and urban rail transit power supply products.
Used to test the continuity of paint film of enamelled round wire with nominal diameter of 0.050mm or above and 1.600mm or below (i.e. the number of pinholes per unit length of enamelled wire sample).
It is suitable for power department, power department of factories and mines, scientific research unit, railway, chemical industry, power plant, etc.
